Method of splitting glass rollers or cylinders.



P. REO'. METHOD OF SPLITTING GLASS ROLLERS 0R CYLINDERS. I APPLICATION FILED MAY 23. I9I7- RENEWED JAN. 28, 1918- 1,278,014. PatentedSept. 3,1918.

WITNESSES INVENTOR 6&6 QWaMM -formly straight commonly practised heretofore consists-1n,

ting these segments or shawls,

PETER REO, OF ARNOLD, PENNSYLVANIA'ASSIGNOR TOWINDOW GLASS MACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

CORPORATION OF NEW-JERSEY.

METHOD OF SPLITTING GLASS ROLLERS OR CYLINDERS.

Specification of Letters-Patent.-

Application flled May 23, 1917, Serial No. 170,420. Renewed January 28, 1918. Serial No. 214,250.

Figures 1 and 2 are end 'views showing a glass cylinder orroller at different stages of the operation; and

Fig. 3 is a erspective view illustrating another-step o the operation.

My invention has relation to a method of splitting glass rollers or cylinders, and has particular relation to the splitting of rollers or cylinders in the form of flattening lengths and preparatory to flattening. While the invention may be used in making the initial longitudinal split in the rollers,

it is more particularly useful in making the subsequent cut or cuts which are necessary after the initial splittin in cutting the lengths into segments or shawls. In cutdifiiculty has heretofore been experienced in getting unicuts. The method most runnin a heated splittingiron back and forth' t rough the flattening length until a crack is started. These cracks do not, however, alwa s .run along straight lines and considerab e sults.

I have discovered that this difiicult may be almost entirely overcome and uni ormly straight s lits or cracks obtained by heating the cylin er alon the line of the desired split; and therea ter scoring the cylinder. In practice,--I prefer tocarry out the process by running the heated splitting iron through the flattening length fora considerably less period oftime than. has ordinarily been necessary,'and then making an initial score on the outer surface of the glass directly 0 p0- site, and preferably at one end portion 0 the on by the splitting iron.

In the drawings, have shown one method of carryin out my invention, in which the flattening Iengths or rollers 2 are placed on the usual splitting bucks, and the initial splits made in the usual manner by passing it back and forththerethrough the usual splitloss of glass and breakage reting iron, such as indicated at 3 in Fig. 1.

When 'the length has been thus split, it is rotated on the bucks through approximately 180 degrees to the position shown in Fig. 2,

bringing the split side of the roller upper-v most, the split edges being permitted to assume thelrusual overlapped relation, as in dicated at 4. The splitting iron 3 is then run through the cylinder along the line of the next split, but only for about one-half the length of time required for the first splitting. A suitable scoring tool, such as the tool 5, having a small steel cutting wheel 6 is then used to score the cylinder on the outside directly opposite the line of glasswhich has been acted upon by the tool 3. By means of this tool a short score, say of about one inch in length, is made. The cylinder is then put under slight tension to cause the cut to run or is slightly jarred at the point where the score has been made. This causes the cylinder to split into two halves, or

shawls, the split following the course covered rotated'between the first and second splitting I is, of course, varied.

I have above described the method of splitting cylinders by applying heat tothe inner surface and then making a slight scoreon the outer surface of the cylinder, but the same result may be obtained by heating the outer surface, and slightly scoring the inner surface of the cylinder; and other changes may be made without departing from my invention.

My invention has greatly simplified and roved the operation of splitting these re] ers, cylinders, or flattening lengths, and largely reduces the breakage and loss of glass.

I claim: p

1. The herein described method of splitting'glass cylinders, which consists inapplying a heated splitting iron to the inside of the cylinder along the line of the split to be made, and then scoring the cylinder for a short distance along such line, substantially as described. 4

"2. The herein described method of splitting glass cylinders, which consists in applying a heated splitting iron to the inside of the cylinder along the line of the split to be made, and then scoring the cylinder on its outer surface for a short distance along such line, substantially as described.

3. The herein described method of splitting glass cylinders, which consists in run ning a heated splitting iron through the cylinder along the line of the desired split, but to an extent insufiicient to cause splitting, and then applying a scoring tool to the exterior of the cylinder at a point on the said line, substantially as described.

4. The method of splitting glass cylinders, consisting in heating the cylinder along the line of the desired split and then scoring the cylinder on said line, substantially as described.

5. The herein described method of splitting glass cylinders, which consists in inimy hand.

tially splitting the cylinder longitudinally, then applying a splitting iron to the interior of the cylinder at another point where a subsequent split is to be made, Withdrawing said iron before a split is produced, and then scoring the exterior surface of the cylinder along said line, substantially as described.

6. The method of resplitting a longitudinally split glass cylinder, which consists in passing a heated splitting irom along the cylinder along the line of the resplit, and then causing the cylinder to split along such line by applying a scoring tool to the cylinder at a point on said line, substantially as described.

In testimony whereof, I have hereunto set PETER EEO. 

